LCD connection

Abstract

The invention concerns an LCD connection for a communication unit to connect an LCD to PCB. The connection includes several parts to make the connection between the LCD and the PCB reliable, but still easy and cheap to assembly. It is also easy to dismantle since the connector is neither fixed mounted to the LCD nor to the PCB. The connector includes an LCD covered with an Indium Tin Oxide (ITO) pad, an Anisotropic Conductive Foil (ACF) layer on top of the ITO pad, at least one Double Flexible Printed Circuit (DFPC) located on the ACF layer, a spring connector and a PCB. The invention also includes a method for connecting an LCD to a PCB.

What is claimed is:  
     
       1. A liquid crystal display (LCD) connection in a communication unit for connecting a liquid crystal display to a printed circuit board (PCB) in the communication unit, the LCD connection comprising: 
       a LCD with a plurality of connecting pads;  
       a PCB with a plurality of connecting pads; and  
       a connector connecting the LCD to the PCB, where the connector has springy metal parts that are located between the connecting pads of the LCD and the PCB to establish flexible contact with the LCD and the PCB; and wherein  
       the connecting pads on the LCD are Indium Tin Oxide (ITO) pads, and an Anisotropic Conductive Foil (ACF) layer applied on top of the ITO pads bonds at least one Double Flexible Printed Circuit (DFPC) to the ACF layer.  
     
     
       2. A LCD connection according to  claim 1 , wherein the ITO pads are located on the LCD having first a ACF layer applied on the ITO pads, and secondly have at least one DFPC attached to the ACF layer. 
     
     
       3. A LCD connection according to  claim 1 , wherein the DFPC includes two metal layers and one plastic layer, where the plastic layer is located between the two metal layers, the metal layers are one of a gold film or foil, and the plastic layer is made of a polyimide. 
     
     
       4. A LCD connection according to  claim 1 , wherein the connector between the LCD and PCB is a spring connector having two sets of connecting ends to connect, where the connecting ends are springy and the spring connector is mounted flexibly on a lightguide between the LCD and the PCB, and the lightguide holds the LCD and the PCB together and compresses the springy ends of the connector against the connecting pads. 
     
     
       5. A LCD connection according to  claim 2 , wherein the DFPC includes two metal layers and one plastic layer, where the plastic layer is located between the two metal layers, the metal layers are one of a gold film or foil, and the plastic layer is made of a polyimide. 
     
     
       6. A LCD connection according to  claim 2 , wherein the connector between the LCD and PCB is a spring connector having two sets of connecting ends to connect, where the connecting ends are springy and the spring connector is mounted flexibly on a lightguide between the LCD and the PCB, and where the lightguide holds the LCD and the PCB together and compresses the springy ends of the connector against the connecting pads. 
     
     
       7. A LCD connection according to  claim 3 , wherein the connector between the LCD and PCB is a spring connector having two sets of connecting ends to connect, where the connecting ends are springy and the spring connector is mounted flexibly on a lightguide between the LCD and the PCB, and the lightguide holds the LCD and the PCB together and compresses the springy ends of the connector against the connecting pads. 
     
     
       8. A LCD connection according to  claim 4 , wherein the connecting ends of the spring connector are made of gold or gold-plated metal. 
     
     
       9. A LCD connection according to  claim 5 , wherein the connector between the LCD and the PCB is a spring connector having connecting ends and the connecting ends of the spring connector are made of gold or gold-plated metal. 
     
     
       10. A LCD connection according to  claim 6 , wherein the connecting ends of the spring connector are made of gold or gold-plated metal. 
     
     
       11. A LCD connection according to  claim 7 , wherein the connecting ends of the spring connector are made of gold or gold-plated metal. 
     
     
       12. A method of connecting a liquid crystal display (LCD) to a printed circuit board (PCB) in a communication unit comprising the steps: 
       covering the LCD and the PCB with connecting pads;  
       mounting a connecting part in a holder which flexibly connects to the connecting pads of the LCD and the PCB; and  
       connecting the LCD to the PCB by pressing the LCD and the PCB together, wherein the connecting part flexibly establishes an electric contact between the connecting pads of the LCD and the PCB.  
     
     
       13. A method of connecting a LCD to a printed circuit board according to  claim 12 , wherein the connecting pads on the LCD are indium tin oxide (ITO) pads covered by an Anisotropic Conductive Foil (ACF), where the ACF bonds at least one double flexible printed circuit (DFCP), and the ACF establishes an electric connection between the ACF and the ITO pads, and the ACF locates the LCD with the ITO, and the ACF and DFCP on a lightguide, mounts the connecting part comprising a spring in a slot, and mounts the lightguide with the LCD located thereon to the PCB.